Portion of arithmetic operation control machine for electronic computer



FIG. 1 is a front, top and right side perspective view of portion of arithmetic operation control machine for electronic computer, showing my new design;

FIG. 2 is an enlarged fragmented perspective view thereof, taken along the line II—II in FIG. 1;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof; the opposite side being a mirror image thereof; and,

FIG. 6 is a top plan view thereof; the opposite side being a mirror image thereof.

The broken lines are included for the purpose of illustrating environmental structure only and form no part of the claimed design. 

The ornamental design for a portion of arithmetic operation control machine for electronic computer, as shown and described. 